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Shape Magazine recommends a max of 1,000 IU of vitamin D (wrong) - Dec 2014


How to Pick the Best Vitamin D Supplement

But getting too much vitamin D can also be harmful, says Cooperman. Your safest bet, he says, is to get your vitamin D levels tested before choosing a dose. Until you can, avoid taking more than 1,000 IU per day and beware of signs of vitamin D toxicity, like nausea and weakness.

See also VitaminDwiki

Graph of dose vs week

  • Thus the following are safe:
    2 million IU daily for 1 week,
    200,000 IU daily for 1.5 weeks,
    150,000 IU daily for 2 weeks,
    85,000 IU daily for 4 weeks,
    50,000 IU daily for 5 weeks